1. K. Oda, M. Fukutoku, H. Toba, and T. Kominato, “128 channel, 480 km FSK-DD trans-mission experiment using 0.98 mm pumped erbium-doped fiber amplifiers and tunable gain equalizer” IEE Electron. Lett. 30, 982-983 (1994).
2. K. Sekine, N. Kikuchi, S. Sasaki, and M. Aoki, “10Gb/s four-channel WDM transmission experiment over 500 km with technique for suppressing four-wave mixing” IEE Electron. Lett. 30, 1150-1151 (1994).
3. R.B. Kummer, L.R. Dunn, R.E. Fangmann, A.F. Judy, D. Kalish, D.W. Peckham, R.G. Huff, W.A. Reed, A.M. Vengsarkar, K.L. Walker, A.R. Chraplyvy, L. Clark, R. Tkach, and J.J. Thomas, “Fiber design for future high capacity digital transmission” IWCS Proceeding, p. 42 (1995).
4. S. Yoshida, S. Kuwano, and K. Iwashita, “Gain-flattened EDFA with high Al concentration for multistage repeatered WDM transmission” Electron. Lett. 31 (20), 1765-1767 (1995).
5. A.R. Shraplyvy, A.H. Gnuck, R.W. Tkach, and R.M. Derosier, “8 × 10 Gb/s transmission through 280km of dispersion-managed fiber” IEEE Photon. Technol. Lett. 5, 1232-1235 (1993).